Effect of Vibration on Signal Reflection in Aircraft Data Transmission Lines

Abstract

Frequent movements occur on dynamic systems that have different levels of vibration. Knowing the effect of vibration is very important to regulate the strength and installation technique of transmission line for consistent and reliable data communication. Several experiments to detect vibration in different systems have been conducted, but the effect of vibration on signal propagation in aircraft transmission lines has never been investigated. This paper presents the results of the investigation on the effect of vibration on signal reflection in aircraft data transmission lines. Aerospace grade coaxial line was placed on a shaker and a range of signals from 9kHz to 5GHz was swept into the line using vector network analyzer (VNA). Reflected signals were acquired under two vibration magnitudes 1G and 2G, in vibration frequency range of 20Hz, 40Hz, 80Hz, and 160Hz. Vibration levels were investigated at the connection point that simulates real connectors attached in the aircraft that are subject to constant vibration. The results show that reflected signals magnitude from the connector point increased with increase in vibration frequency. The magnitudes of the reflected signals were higher in 2G at 20Hz and 40Hz, but lower at 80Hz and 160Hz compared to that of 1G. Reflected signal had two highest peaks at 5.2ns and 14.5ns that represents reflections from cable connections. Vibration was observed at 5ns reflection peak. Reflected signal magnitude increased with increase of vibration frequency that follows two-term exponential function.

Department(s)

Mechanical and Aerospace Engineering

Comments

Missouri University of Science and Technology, Grant TCA311201

Keywords and Phrases

Aircraft Data Transmission Line; Coaxial Cable; Non-destructive Evaluation; Structural Health Monitoring; Vibration; Vibration Magnitude

International Standard Book Number (ISBN)

978-151068660-1

International Standard Serial Number (ISSN)

1996-756X; 0277-786X

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2025 Society of Photo-Optical Instrumentation Engineers (SPIE), All rights reserved.

Publication Date

01 Jan 2025

Link to Full Text

Share

 
COinS